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Re: [PATCH] PowerPC: Optimized mpn functions for PowerPC64

From: Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>
To: libc-alpha at sourceware dot org
Date: Mon, 04 Nov 2013 16:38:45 -0200
Subject: Re: [PATCH] PowerPC: Optimized mpn functions for PowerPC64
Authentication-results: sourceware.org; auth=none
References: <527795AB dot 20203 at linux dot vnet dot ibm dot com> <Pine dot LNX dot 4 dot 64 dot 1311041612120 dot 4290 at digraph dot polyomino dot org dot uk> <5277E595 dot 2040300 at linux dot vnet dot ibm dot com>

On 04-11-2013 16:21, Adhemerval Zanella wrote:
> On 04-11-2013 14:13, Joseph S. Myers wrote:
>> On Mon, 4 Nov 2013, Adhemerval Zanella wrote:
>>
>>> +   version 2.r1 of the License, or (at your option) any later version.
>> Typo "version 2.r1".
>>
>> Benchmarks for strtod would be good.
>>
> Fair enough, I'll address the benchmark in another email.
>
Using the sent benchtest for strtod I got these outputs in a POWER7 3.3GHz ('baseline'
the default for C implemention and 'optimized' using the new MPN ones). As you can see
the gain is where the multiprecision routines are used more extensivelly (input
1e308, 100000000e300, 1e-307, 0.000001e-301, etc.).

Attachment: baseline.out
Description: Text document

Attachment: optimized.out
Description: Text document

References:
- [PATCH] PowerPC: Optimized mpn functions for PowerPC64
  - From: Adhemerval Zanella
- Re: [PATCH] PowerPC: Optimized mpn functions for PowerPC64
  - From: Joseph S. Myers
- Re: [PATCH] PowerPC: Optimized mpn functions for PowerPC64
  - From: Adhemerval Zanella

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